Book digitized by Google and uploaded to the Internet Archive by user tpb.
Imprint of v. 4: London, H. G. Bohn, 1856
"Memoir of the late William Thompson": v. 4, p. [x]-xxx
I. Birds: Raptores & Insessores. 1849.--II. Birds: Rasores & Grallatores. 1850.--III Birds: Natatores. 1851.-- IV. Mammalia, reptiles, and fishes. also Invertebrata. [Comp. from the author's manuscript notes by R. Patterson, J. R. Garrett and G. Dickie, and ed. by R. Patterson] 1856
"Memoir of the late William Thompson": v. 4, p. [x]-xxx.